Dissimilar pipe joints under high temperature, high pressure transients and under cyclic loading

A pipe joint, heterogeneous technology, applied in the direction of pipe/pipe joint/fitting, flange connection, engine cooling, etc., can solve the problem of reducing life expectancy and other problems
CN107110408BActive Publication Date: 2020-04-24GENERAL ELECTRIC TECH GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GENERAL ELECTRIC TECH GMBH
Publication Date
2020-04-24

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Abstract

A dissimilar pipe joint arrangement (28) is described comprising a first pipe section (30) and a second pipe section (31), and a dissimilar pipe joint between the first pipe section and the second pipe section , the first and second continuous pipe sections (30, 31) are respectively made of first and second metallic materials (M5, M6) having different material characteristics and properties. Improved lifetime and extended applicability are achieved, wherein said dissimilar pipe joint (28) is a coupling joint (F1, F2), said first pipe section made of said first metallic material (M5) (30) At one end, there is a first coupling piece (F1) made of said first metal material (M5), said second pipe area made of said second metal material (M6) The segment (31) is provided at one end with a second coupling (F2) made of said second metallic material (M6), and the first coupling (F1) and the second coupling (F2) are bolted Together, whereby the first seal is established by direct metallic contact between the front faces of the first coupling ( F1 ) and the second coupling ( F2 ).
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Description

technical field

[0001] The present invention relates to the technology of pipes comprising sections of different materials. It involves dissimilar piping joints. Background technique

[0002] The use of different metals / alloys which differ in their metallurgical properties and which in this context are referred to as "dissimilar metals" in the joint, which expose For high temperature, high pressure loads, high cycling, and high transients with external forces and moments.

[0003] Existing codes and standards / literatures in the industry have less information on the properties and safety of such joints and are often unsafe.

[0004] figure 1 A basic scheme of a combined cycle power plant (CCPP) 10 is shown. figure 1 The combined cycle power plant 10 includes a gas turbine 11 connected to a water / steam cycle 12 via a heat recovery steam generator (HRSG) 19 .

[0005] The gas turbine 11 includes a compressor 14 which draws air through an air inlet 13 and delivers the compr...

Claims

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